动名词作非谓语动词的例句如下：

Swimming is a great form of exercise.

To learn a new language is always challenging.

The running man crossed the finish line first.

Seeing is believing.

Playing with fire is dangerous.

It’s no good/use doing.

I enjoy listening to music.

He often practices playing the piano in the evening.

Would you mind turning down your radio a little, please？

He suggested our trying it once again.

His not knowing English troubled him a lot.

Reading aloud is very helpful.

Collecting stamps is interesting.

They haven't finished building the dam.

We have to prevent the air from being polluted.

I regret not following his advice.

Going to bed early and getting up early is good for our health.

Walking in the park, I saw a beautiful butterfly.

He enjoys playing basketball.

She is interested in learning Chinese.

这些例句展示了动名词在句子中作主语、宾语、定语和状语等多种成分的用法。希望这些例子能帮助你更好地理解动名词的非谓语动词用法。